Many of us here tie. Even if you don't tie all your own, tying is a great skill to learn. Once you master the basic tying techniques, there's many, many fly patterns that can be tried.
For a first fly, a Woolly Worm or Woolly Bugger is a good one, and can be productive for many species.
You might also consider patterns such as foam beetles or ants, which are simple, and again productive for a variety of species. Plus, the materials are easy to find in craft shops or dollar stores.
BTW, welcome to the forum! Any other help we can give just ask! There's never a shortage of good advice here!